What components are MVC in JSF MVC framework?

Question

In JSF MVC framework who is Model, View, and Controller?

Answer 1

This depends on the point of view (pun intented).

In the big architectural picture, your own JSF code is the V:

M - Business domain/Service layer (e.g. EJB/JPA/DAO)
V - Your JSF code
C - FacesServlet

In the developer picture, the architectural V is in turn dividable as below:

M - Entity
V - Facelets/JSP page
C - Managed bean

In the smaller client picture, the developer V is in turn dividable as below:

M - JSF component tree
V - Rendered HTML output
C - Client (webbrowser)

In the yet smaller JavaScript picture, the client V is in turn dividable as below:

M - HTML DOM tree
V - Visual presentation
C - Event listener functions (enduser interaction and Ajax)

So it's basically a M(M(M(MVC)C)C)C ;)

Note that some starters and even some —very basic— tutorials mingle/copy/flatten the entity's properties in the managed bean, which would effectively make the controller a model. Needless to say that this is poor design (i.e. not a clean MVC design).

The code snippets in the following answers illustrate the right MVC approach:

• JSF Controller, Service and DAO
• Creating master-detail pages for entities, how to link them and which bean scope to choose
• Passing a JSF2 managed pojo bean into EJB or putting what is required into a transfer object
• Filter do not initialize EntityManager
• javax.persistence.TransactionRequiredException in small facelet application

Answer 2

The faces servlet manages the faces lifecycle so in that sense it is the controller combined with your own code that may get called during each lifecycle phase

http://www.java-samples.com/images/jsf-lifecycle.gif

Answer 3

M odel would be your ManagedBean

V iew would be jsp,XHTML (well you can accommodate various views here )

C ontroller will be FacesServlet

Update, hope this picture helps more